Mining apparatus



' March 27, 1928.

' v M. P. HOLMES MINING APPARATUS Filed Jan. 5,- 1920 Patented Mar. 27,1928.

D" s'r Ar as; PATENT oer Ion MORRIS P. HOLMES,=ZOE CLAREMQNT, NEWHAMPSHIRE: ASSIGNOR TO SULLIVAN MACHINERY COMPANY, ACORPORATION-OF.MASSACHUSETTS MINING APPARATUS.

Application filed January 5, 1920. Serial No. 349,526.

hlylinvention relates to mining apparatus. It has" for its object toprovide an improved apparatus especially adapted to use incut-tin'g'kerfs at a level-above the mine bottom, and more especially totruck mounted apparatusadaptedeto cutkerfs at different levels relativeto-the mine bottom. more specific object of my invention is to provideimproved means for transporting, supporting'a'nd adjusting amining'machine of: the usual so called room and pillar type, whereby thesame maybe convenient 1y transported adapted. to out either room orentry work, objects andadvantages of my improved c011- struction will,however, hereinafter more fully appear.

In the accompanying kerfs at varying levels in bodiment which my inpractice. r

In these drawings, I v r Fig. 1 is a side elevation of this form of myinvention, certain partsbeingshown in full and dottedlines in differentpositions.

Fig.2.isaplanview-of the-vertically adjustable truck. 7 v

Fig. 3 is a diagrammatic plan view'showing. the difierent cuts made bythe cutting mechanism, In this illustrative construction, I havedisclosed invention as'applied to use in connection with standard formof mining machine 1, of the room and pillar. type, having a feed drivingmember 2 and aiflexible feed member 3 adapted toengage therewith insucha manner thatthemachine is movable relative to the] feed member whenmounted upon a support, as herein, or when supported direct-ly upon thebottom, my improvements means for transporting,supporting,'and ad,justing such a machine. r i

In my improved construction it willybe observed that a wheeledtransporttruck frame 4 is provided, herein rigidly supported on suitableupstanding supports 5,which are in turn carried on a lower frame 6'carryin suitable removable axle boxes 7 and usual truck wheels 8.Obviously, the frame t majflhowever, be carried at any suitable levelwithrespcct to the axes ofthe truck from place to place and .These andother drawings I have shown, for purposes of illustration,- one eminventon may assumev herein contemplating improved selected; Carried upon thisframe 4, and

herein pivotally connected thereto at its rear endon atra-nsverse axis,as at 9, is an up'per machine supporting andv guiding frame 10 normallydisposed in horizontal relation upon and preferably within the frame 4and movable vertically about, its pivot from that horizontal position toa plurality of inclined-positions such as the inclined position shown indotted lines in Fig. 1. This frame member 10 in turn carries at its rearend usual truck driving mechanism 11, herein for example driven from agear'12 on themining machine land in turn operatively connected, asthrough a chain 13, withthe truck wheels 8; and, furthenis provided witha usual cable reel 14: and a usual abutment 15,to'. which the flexiblefeeding member 3 of the mining machine may be connected to move themachine longitudinally toward the'rear end ofthe member 10.

Operatively connected to the transport truck comprising thesecooperating members 4' and 10, is anotheror cutting truck element whichis adapted to receive the mining machine from the member 10 in certainpositions of this other truck element. As shown, this'lastmentioned-truck element includes a frame 16 having a bottom plate orskid 17 removably mounted on truck wheels .18 and carrying an uppermachine receiving and guiding member or slide 19 mountedi or verticaladjustment relative to the frame 16 up'on jack screws 20, the latterherein being disposed one at the front end of. the frame and two at therear endthcreof, and arranged to be manually adjusted through movementof rotating;members 21. As shown, this member 19 is carried directly ona swivel plate 22 rotatable at 23 on a corresponding lower plate 24;disposed bea draw bar 27 pivotally connected at one end to the member 19on a horizontal pivot 28 and pivoted at its opposite end to the member10 on a vertical pivot 30. Thus it will be noted that a construction isproduced which is adapted to be vertically adjusted and yet to permitthe transfer of the mining machine from its supporting and guiding framein any position of-the parts. It will also be noted that suitableprovision is made, herein in the form of a well known latch mechanism 29adapted to lock the machine on the member 19 and thereby enable themachine to cut when carried by said member, the same movable latch onthe machine preferably also being adapted to engage the frame 10 to lockthe machine thereto when in transport position.

In the use of my improved construction, the machine is carried duringtransport, on

the power-driven truck, the member 10 then preferably being disposedhorizontally with respect to the track. Through its connection with thevertically adjustable truck, the power driven truck thus acts to push ordrag the former about the mine. When a place is reached, the trucks aremoved to the desired position in the room or entry, 30 and then, byadjusting the members 21' of vertically into the desired verticalcutting position. During this adjustment, through the connection 27between the member 23 and the member 10, the latter member will likewisebe adjusted, about its pivot in such a manner as to form an inclinealways connecting the member 19 and the member 10. As a result, when themember 19 is adjusted as desired, by simply connecting the flexible feedmember 3 of the mining machine to a suitable abutment at a point inadvance of the machine, the latter may be caused to travellongitudinally and up the member 10 into an operative position uponthemember 19, in which position the machine may be suitably locked by thelatch 29. When in this position, it will be evident that through theswivel connection of the member 19, that member may be swung about itspivot as desired to insert various types of cut. For instance, it may beswung in such a manner that, when the flexible feed member is connectedto the face, as shown in full lines in Fig. 3, and thereaftersuccessively connected in well known steps (not shown), the machine maybe made to cut a so-called arcwall cut in an entry, the machine andtrucks moving toward or from the face during the usual sumping andwithdrawal cuts. Conversely, when it is, desired again to transport themachine about the mine, as to a different place, by simply swinging themember 19'into alinement with the member 10 and connecting the flexiblefeed member to the abutment 15 on the rear end of the the jack screws,the member 19 is adjusted recess;

member 10, the machine may be fed rearward into its transport positionshown in Fig. 1, and then, even while tilted slightly, if desired,propelled through the truck driving mechanism to any desired place,where cutting can be resumed at the same or a different level, as maybenecessary.

As a result of my improved construction it will be observed that itispossible to adjust the kerf cutting mechanism vertically with greatfacility and without the necessity for providing any heavy or expensivepower driven vertical adjusting means, the member 19 being vertically adustable manu- V ally when unloaded, and by a simple and relatively easyadjustment of the jack screw members 21. Attention is also directed tothe fact that the mechanism used does not in any Way compel the miningmachine to be dismantled or rendered incapable of use at any time as abottom cutter, and itshould also be noted that by simply removing themember 1 and supports 5 and connecting the axle boxes 7 directly to themember 10, the

transport truck may likewise be readily adapted, when desired, to use inits ordinary cally described one form which my invention may assume inpractice, it is to be .understood that this form of the same is shownfor purposes of illustration and that thcinvention may, be modified andembodied in various other forms without departing from its spirit or thescope of the appended claims.

lVhat I claim as new and desire to secure by Letters Patent is: V v

1. In a minlng apparatus, a wheeled machine guiding element, avertically adjust able machine support, and operative connectionstherebetween for tilting said element as the elevation of said supportis varied.

2. In a mining apparatus, a plurality of trucks, one verticallyadjustable and the other having a vertically tiltable portion,-

and means for tilting said portion as the first truck is ad usted.

8.111 a mining apparatus, a transport truck having a tiltable machineguiding portion, a cutting truck having a vertically adjustable machinereceiving portion, and operative connections between said trucks.

4. In a mining apparatus, a transport truck having a tiltable machineguiding per-- mes es tion, a cutting truck having a. vertically.adjustable machine receiving portion, and a draw bar pivotallyconnected between said portions.

5. In a mining apparatus, a transport truck having a tiltable machineguiding portion, a cutting truck having a vertically adjustable portion,and means for-tilting said tilting portion as said vertically adjustableportion is adjusted. 6. In a mining apparatus, a transport truck havingrunning gear and adapted to support a mining machine during runningaround a mine, a cutting truck having running gear and adapted tosupport a mining machine during the cutting operation, the running gearof said trucks being guided by the same trackway, and machine guidingmeans extending between said trucks for transferring a mining machineoff of either of said trucks onto the other.

7. In a mining apparatus, a transport truck adapted to transport amining machine during running around a mine, a cutting truck adapted tosupport and to move bodily with a mining machine during the cuttingoperation and having machine receiving portions disposable in apluralityof different positions relative to other portions of said truck, andmeans for transferring a mining machine off of either of said trucksonto the other in different positions of said machine receiving portionof said cutting truck.

8. In a mining. apparatus, a transport truck adapted to support a miningmachine during running around a mine, a cutting truck adapted to supportand to move bodily with a mining machine during the cutting operation,and means for transferring a mining machine off of either of said trucksonto the other when said cutting truck is at a diiferent elevation fromsaid transport.

truck. 7

9. In a mining apparatus, a transport truck, a vertically adjustablecutting truck, and means including a machine guiding frame extendingbetween and connected to said trucks for transferring a mining machine.between said trucks in different vertical positions of the latter truck.

10. In a mining apparatus, a transport truck, a cutting truck, manuallyoperable means for varying the elevation of the latter, and meansincluding a machine guiding.

frame extending between and connected to said trucks for thereaftertransferring a machine from said transport truck to said cutting truck.

11. In a mining apparatus, a cutting truck, a mining machine supportthereon, a

mining machine manually operable. means for vertically adjusting saidsupport, means-v for thereafter feeding said mining machine onto saidsupport under itsownpower, and

power operated means for moving said machine and truck along a trackwayduring the cutting operation.

12. In a mining apparatus, a cutting truck, manually operable means forvertically adjusting the same, a transport truck, and a pivotallyconnected guiding frame thereon angular-1y adjustable as said cuttingtruck is adjusted.

13. In a mining apparatus, a. rigid upstanding transport truck, and amining machine receivingand guiding frame thereon including means forslidably receiving a unitary mining machine during loading and unloadingthereof, said frame being normally disposed inhorizontal relation andtiltable relative to said truck about a horizontal axis to elevate itsfront end above the horizontal.

. 14. In a mining apparatus, a transport truck, and a normallyhorizontally disposed mining machine receiving and guiding frame thereonincluding means for slidably receivinga unitary mining machine duringloading and unloadingthereof, said. frame being tiltable about ahorizontal axis at the rear end of said truck to elevate its front endabove the horizontal.

15. In a mining apparatus, a wheeled transport truck, a machinereceiving frame pivoted on a transverse axis on the rear end thereof,and wheel driving mechanism on said machine receiving frame. I

16. In a mining apparatus, a wheeled transport truck, a machinereceiving frame pivoted on a transverse axis on the rear end thereof,and wheel driving mechanism on said machine receiving frame in rear ofsaid pivot.

17. In a mining apparatus, a transport truck including a horizontalframe member, upstanding supports beneath the same, and wheels beneathsaid supports, and a machine receiving. member pivoted on a transverseaxis on said horizontal member, said receiving memberoverlying saidhorizontal frame member and-adapted to slidably receive a unitary miningmachine during loading and unloading thereof. v

18. In a mining'apparatus, a transporttru ck including ahoriz'ontalframe member, upstandingsupport-s beneath the same, and wheels beneathsaid supports, a machine receiving member pivoted on a tran verse axison said horizontal member, and wheel driving mechanism on saidpivotedmember.

19. In a miningapparatus, a truck comprising a wheeled frame, avertically ad tions, a unitary mining machine carried by said member,and means for fixing said machine on said member.

20. In a mining apparatus, a truck comprising a wheeledvframe, avertically adjustable portion thereon, means acting on said verticalaxis portion at three substantially spaced points for adjusting the samevertically, a machine receiving member swivelly mounted on saidvertically adjustable portion and during transport disposedlongitudinally of said truck, means for holding said swiveled member indifferent angular positions, a unitary mining machine carried by saidmember and means for fixing said machine on said member.

21. In a minin apparatus, a truck comprising wheeler frame, a verticallyadjustable portion thereon, means for adjusting the same vertically, amachine receiving slide swiv-elly mounted on said vertically adjustableportion for pivotal movement relative thereto upon a vertical axis andduring transport disposed longitudinally of said truck, means forholding said swiveled slide in different angular positions, a miningmachine receivable in said slide and disposed longitudinally thereof andmeans for fixing said machine on said slide.

22. In a mining apparatus, a truck comprising a Wheeled frame, avertically adj ustable portion thereon, a machine carrying memberswiveled on said portion for pivotal movement relative thereto upon avertical axis, means for holding said member in dif ferent angularpositions, a complete mining machine carried on said carrying member,

and means operated by said machine for swinging said swiveled memberrelative to sald ad ustable portlon and for moving said machine andtruck bodily along a trackway.

23. In a mining apparatus, a truck comprising a wheeled frame, avertically adjustable portion thereon, a machine carrying memberswiveled on said portion for pivotal movement relative thereto upon avertical axis, means for holding said member in different angularpositions, a complete mining machine carried on said carrying member,and means for fixing said mining machine thereon.

24. In a mining apparatus, a truck comprising a wheeled frame, avertically adjustable portion thercon for pivotal movement relativethereto upon a vertical axis, a machine receiving member swiveled onsaid portion, means for holding said member in diflerent' angularpositions, a complete mining machine carried on said receiving memherand latching mechanism between said receiving member and machine.

25. In a'mining apparatus, a truck comprising a wheeled frame, avertically adjustable portion thereon,a machine carrying member swiveledon said portion for pivotal esa-see movement'relative thereto upon avertical axis, a complete mining machine carried on said carrying memberincluding a'fiexiblc feeding member, and means operated by said flexiblemember for swinging said machine and swiveled member during the cuttingoperation.

26. In a mining apparatus, a truck comprising a wheeled frame, avertically adjustable portion thcreon, a machine carrying memberswiveled on said portion for pivotal movement relative thereto upon avertical axis, means for holding said member in different angularpositions, a complete mining machine carried on said carrying memberincluding a flexible feeding member, and means operated by said flexiblemember for swinging said swiveled member relative to saidadjustableportion and for moving said inachi e and truck bodily along atraclrway.

27. In a mining apparatus, a plurality of operatively connected wheeledtrucks, a unitary mining machine, operative connections whereby saidmining machine may be moved relative to the wheels of one of said trucksunder its own power while cutting, power operated means for moving themachine and truck alon a trackway while cutting, and operativeconnections whereby the wheels of said other truck may be drivenby thepower of said mining machine during transport.

28. In a mining apparatus, a truck comprising wheels, a frame, anintermediate spacing means, and a cooperating operatively connectedtruck comprising wheels, a skid, machine carrying means on said skid,said trucks having provision whereby when disconnected said frame may becarried at will directly on said wheels and whereby said cooperatingtruck may slide on the bottom" on its skid when said trucks aredisconnected, and machine guiding means extending between said trucksand connected thereto, for guiding a mining machine for movement fromone truck to the other.

29, In a mining apparatus, a skid, a vertically adjustable portioncarried thereon, a swiveled mining machine carrying member carried onsaid vertically adjustable portion for pivotal movement relative theretoupon a vertical axis,'means for holding said memher in different angularpositions, a unitary mining machine on said swiveled member, and meansfor fixing said mining machine on said swiveled member.

30. In a mining apparatus, a skid, a vertically-adjustable portioncarried thereon, a swiveled mining machine carrying member carried onsaid vertically adjustable portion for pivotal movement relative theretoupon a vertical axis, means for holding said member in different angularpositions, a unitary mining machine carried on said member, and meansfor fixing said machine thereto.

31. In a mining apparatus, askid, a verti- Cally. adjustable portioncarriedvon said skid,

. mining ,inachine.

manually operable means tor adjusting the same, a swiveledmining machinereceiving slide carried on said vertically adjustable portion forpivotal movement relativetheretoupon a vertical axis, and wheelsremovably attached tosaidj skid.

i 32.- In a miningapparatus, a s.kid,'avertically adjustable portioncarried .on said skid, manually operable means for adjusting the same,aswiveled mining machine receivingslide carried on said verticallyadjustable portion, meansifor locking the same in aplurality ofangularpositions, and Wheels removably, attached to said skid. a

33. In a mining apparatus, an elevated transport truck, a cutting'truckhaving a vertically adjustable support thereon, a machine guiding-memberpivotally mounted on said transport truck on ahornzontal axis, a machlnereceiving slide swlveled on;sa1d vertically; adjustable support, andmeans between said guiding member and said support for tilting theformer about its pivot as the elevation of said support: is varied.

,34..In a mining, apparatus, an elevated transport truck, a cuttingtruck havmg .a

vertically adjustable supportthereon, a machine :guiding.membenvpivotally ;mo unted onsaid transport truckon a horizontal axis, Vg 4 chine of a bottomx cutting type including a a' machine receiving,slide swiveled on said vertically ,ad ustable support,,mea ns betweensaid guiding member and ,said support for Wheeled transport truck, acutting truck having a vertically vadj ustabletsupport thereon,atmachine guiding member pivotally l mounted. on said transport. truckon Et llOllzontal axis, a machinereceivingslide swiveled on. a'verticalaxis on said vertically adjustable support, means between a said guiding member and saidsupport. for tilting the formerabout its pivotas theelevation of said support is varied,- a mining rmachine normally,carrieclon said,machineguiding I v I tively connectible to said,kerftcutter durlng member havingprovision for propelling itself betWeensaid guidingmember andrsaiid slide, and Wheel drivingmechamsmaoperatively connected to the Wheels of said transport truck and carriedon said machine guiding-member. adapted to be driven by said 36.. Inmining apparatus, a Wheeled mach ne; guidlng element, awheeledvertlcally adjustable mach ne.support, and operative connections,therebetween vfor tilting said element, as .the relevation of saidsupport "is varied;

37 In amining apparatus, a wheeled trans port truck, a Wheeled cuttingtruck, the Wheels pri.s. ng 'W d am a ve ti al g ,able portionthereon,am ning mac of, said truckbeing adaptedto run along the sametraclnvay, means for transferring a mining machine ,from one truck tothe other, andineans for: locking; said ,machine in operative1pjosition- 1 on either of said tracks.

138, $1 1, a mini g; arpara Whee transport truck, a wheeled cuttingtruck, the

wheels of said truck being adapted to run along the same trackway, meansfor transferring a mining, machine from one truck to the. other, andmeanslfor utili ing the power of saidmachine for ,movingeither vof saidtruck longitudinally of the trackivay-during cutting on said portion.

40. In a miningyapparatus,atruck comadju n carrai s. memb r wivele on aport-i011,

mea-ns fort holdingsaid member; in difi'erent angu rd-p n a em let lm im cutterv barandrmeans, operative to swing said ,barfluring cuttingor to)move said" truck longitudinally of the trackway during cutting, andtruck Wheel driving mechanism opferat1vely connectlble to said m ningmach ne during transport.

41. Ina mi 'ing apparatus, atruck com- ,prising a Wheeledirame, avvertically adj u st- ,able portion, thereon, a kert cutter carryingmember .sWiveled on said, portion for pivotal movementrelative theretoupon a vertical axis,, means for holding said memberin jdif- ,ferentangular positions, kerf cutting mecha nism thereon andmov'ablehorizontally. rectilinearly relative thereto including a cutterbar and means operative, to swing said member vduring cutting, or tomove saidit-ruck longitudinally of a trackivay during cutting,

and truck heel driving mechanism operatransport.

prising a Wheeled frame,a vertically adjust V able portion thereon, nut,and screw connec- ,tions for. adjusting said portion, a machinereceiving member, swivelly mounted on said vertically adjustable portionfor; pivotal adj ustment relative theretoona vertical axis,

a mining machine carried by said I member andtslidable rectilinearlyhorizontally relativethereto, and means operated by said machine forswingingsaid swiveled member relativetosaidadjustableportion.

'43. In a mining apparatus, a wheeled 'tion of a wheeledtruckframe, aguiding "table. 7

transport truck including means receiving a mining machine fortransport, a second wheeled truck'having means for receiving said miningmachine from said first mentioned truck preliminary to cutting, andmachine guiding means pivotally connecting said trucks.

441111 a mining apparatus, a cutting truck, a mining machine supportthereon, means for vertically adjusting said support including pairs ofcooperating relatively rotatable threaded members, one member ofeachpair being rotatable to efiect longitudinal'movement of, the othermember of its respective pair, said other members of saidpairs movingwith said support while the latter moves relative to the first mentionedmembersof saidpairs, a mining machine having cutting mechanism, andmeans for feeding said mining machine onto said support under its ownpower after adjustment of said support," said machine moving ontosaidsupport at the end thereof opposite that from which its cuttingmechanism operates.

45. In a mining apparatus, a wheeled frame, a supporting framevertically adjustable relatively to said frame, a turntable mounted onsaid supporting frame, a mining machine guiding frame mounted on said Iturntable adaptedto slidably receive'a uni tary mining machine, and amlning machine having power operated feeding mechanism for moving thesame relative to said guiding frame.

426.111 a mining apparatus, a wheeled frame, a supporting framevertically adjustable relatively to said frame, a turntable mounted onsaid supporting-frame, a machine guiding frame pivotaliy connected onsaidturntable adapted to slidably receive a unitary mining machineduring loading and unloading thereof, and a mining machine havingfeeding mechanism for moving the same relative to said guiding frame andfor swinging said guiding frame on "said turn- 4c7. In a miningapparatus, av wheeled truck frame, and a guldmg frame thereon adapted toslidably receive a unitary mining machine of the type adapted to slideduring cutting'directly on a mine bottom and tilt able at its rear endabout a relatively fixed horizontal axis to elevate the front-endthereof above the horizontal,

48. In a mining apparatus, the combinaframethereon adapted to slidablyreceive a unitary. mining machine during loading and unloading thereof,and means operatively connected tosaid wheeled truck frame whereby saidmachine may be supported in- I dependently of said guiding frame indifferent elevated positions during cutting.

49. In a mining apparatus, a truck comprising a wheeled frame, a miningmachine support thereon, guiding means on'said'supmoves relative to saidfirst n'ient-ioned members of each pair.

50. In a mining apparatus, a truck com prising a Wheeled frame, asupport thereon, guiding means on said support for slidably receiving amining machine, a unitary mining machine on said guiding means, meansfor fixing said machine on said guiding means, means for verticallyadjusting said support relatively to said fran ieiincluding pairs ofcooperating relatively rotatable threaded members,'one member ofeachpair being rotatable to'effect longitudinal move- 7 ment of the otherelement of'its respective pair and said other members 'moving with'saidsupport while the latter moves relative to said first mentioned membersof eachlpair, and means for feeding said miningmachine on to saidsupport after said verticaladjustment has been made. I I

51. In a mming apparatus, a truck com- I prising a.wheeled frame, asupport thereon including a pivoted guiding frame portion adapted toslidably receivea unitary mining machine, a mining machine carried'on'said guiding frame, means for fixing said machine on said guidingframe, means'for holding said guiding frame in different angularpositions, means for vertically .jadj'usting said support relatively tosaid wheeled frame including pairs of cooperating relatively rotatablethreaded members, one member of each pair being rotatable to effectlongitudinal movement of the other element of its respective pair andsaid other members I moving with said support while the latter movesrelative to said first'me'ntioned members of each pair, and means forfeeding said mining machine on to said support after said verticaladjustment has been made. j

52 In a mining apparatus, a t-ruclr'comprising a Wheeled frame, asupport thereon, guiding means on said support for slidably receiving amining machine, a unitary min-, ing machine removably carried on saidguiding means, means for fixing said machine on said guiding means,means for vertically adjusting said support relatively to said frameindependently ofsaid mining machine including pairs of cooperatingrelatively rotatable threaded members, one member of each pair beingrotatable to effect longitudinal movement of the other element of itsrespective pair and said other members moving With said support Whilethe latter moves relative to said first mentioned members of each pair,and means for feeding said machine longitudinally from said support.

53. In a mining apparatus, a truck comprising a Wheeled frame, a supportthereon including a pivoted machine guiding frame, a unitary miningmachine removably carried on said support, means for fixing said machineon said guiding frame, means for holding said guiding frame in differentangular positions, means for vertically adjustlng said supportrelatively to said guiding frame independently of said mining machineincluding pairs of cooperating relatively rotatable threaded members,one member of each pair being rotatable to effect longitudinal movementof the other element of its respective pair and said other membersmoving With said support While the latter moves relative to said firstmentioned members of each pair, and means for feeding said miningmachine longitudinally from said support.

54. In a mining apparatus, a truck comprising a wheeled frame, a supportswivelly mounted thereon, a unitary mining machine removably carried onsaid support, means for fixing said mining machine on said support,means for holding said support in different angular positions. means forvertically adjusting said support relatively to said frame independentlyof said mining machine including pairs of cooperating relativelyrotatable threaded members, one member of each pair being rotatable toeffect longitudinal movement of the other element of its respective pairand said other members moving with said support While the latter movesrelative to said first mentioned members of each pair, and means forfeeding said machine bodily from said support when the latter isdisposed in different angular positions relatively to said truck frame.

In testimony whereof I afiix my signature.

MORRIS P. HOLMES.

CERTIFICATE OF CORRECTION.

Patent No. 1,664,384, Granted March 27, 1928, to

MORRIS P. HOLMES.

It is hereby certified that error appears in the printed specificationof the above numbered patent requiring correction as iotiows: Page 4,lines 54 and 55, claim 24, strike out the words "for pivotal movementrelative thereto upon a vertical axis"; same page and claim, line .57,after the word "portion" insert a comma and the Words "tor pivotalmovement relative thereto upon a vertical axis"; page 5, line 20, claim33, for the misspelled word "hornzontal" read "horizontai", and line 70,claim 37, for the Word "tracks" read "trucks"; and that the sairiLetters Patent should be read with these corrections therein that thesame may conform to the record of the case in the Patent Office.

Signed and sealed this 29th day of May, A. i). 1928.

M. J. Moore, Acting Commissioner of Patents.

(Seal)

